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(No Model.) 2 SheetsSheet 11 N. O. BASSETT.

VALVE DEVICE FOR HYDRAULIC ELEVATORS.

No. 390,111. Patented Sept. 25 1888.

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(No Model.) 2 Sheets-Sheet 2..

N. C. BASSETT.

VALVE DEVICE FOR HYDRAULIC ELEVATORS. No. 390,111. Patented Sept. 25, 1888.

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PATQNT ()FFICE.

NORMAN O. BASSETT, OF CHICAGO, ILLINOIS, ASSIGNOR TO THE HYDBAULIQ ELEVATOR COMPANY, OF SAME PLACE.

VALVE DEVICE FOR (HYDRAU LIC ELEVATORS.

SPECIFICATION forming part of Letters Patent No; 390,111, dated September 25, 1888.

Application filed June 25. 1886. Serial No. 206,258. (No model.)

To all whom, it may concern:

Be it known that 1, NORMAN O. BASSETT, a citizen of the United States, and a resident of Chicago, Cook county, Illinois, have invented certain new and useful Improvements in Valve Devices for Hydraulic Elevators, of which the following is a specification.

My invention relates to that class of hydraulic elevators in which the main valve of the elevating-engine is operated by an auxiliary engine; and myinvention consists in certain devices, fully set forth hereinafter, for insuring a positive and accurate movement of the main valve of the elevating-engine.

, in the drawings, Figure 1 is a sectional eleengine. Fig. 2 is a plan view of the'valveports. Fig. 3 is asectiou illustrating a modification of the apparatus shown in Fig. 1. Fig. 4 is a plan illustrating the arrangement of the valve-ports in the apparatus shown in Fig. 3, and Fig. 5 is an edge view of the piston of the valve-operating engine shown in Fig. 1. Fig. 6 is a sectional view on the line :0 x of Fig. 1, looking in the direction of the arrow, u and showing the means employed to prevent rotation of the main valverod.

The valve-casing A contains both the main valve and the piston of the operating-engine. 3C The valve A, which is not shown in detail, slides vertically within the lower portion of the casing, so as to close the inlet-port m or discharge 3 or both, according to its position, and is of such length or has a lap as to permit a limited movement in either direction opposite the port as without uncovering the same.

iThe piston P of the valve-operating engine is connected to the valve A by a red, It, and a rod, it, extends through the head of the cylinder or casing and is provided with a lateral arm, S, for the purpose described hereinafter.

Attached to or forming part of the casing, or that portion, U, which constitutes the cylinder of thevalve operatingengine,isavalve-casing, V, with an internal lining, L, of brass or other suitable material, projecting in the form of a tube beyond the ends of the casing, and within this lining slides or is fitted the auxiliary vation showing the main valve and operatingvalve B, which controls the movement of the piston of the engine.

Transverse ports b b afford a communication between the cylinder 0 and the valvecasing V, and are arranged along the length 5 of the cylinder 0 for the distance that the piston P is to travel therein. These ports are shown as arranged in rows of three upon diagonal lines, one above the other, so that as the valve moves in eitherdireetion it will uncover 6 only one port at a time. (See Fig. 2.)

A port or passage, 1?, extends from the upper face of the piston P to the periphery of the same at a point opposite the ports 6 b, and is of such width as to extend across the series 6 of ports.

The auxiliary valve B contains a central channel or passage, f, which communicates through holes N with a circumferential recess,

N of the valve, so that upon lifting the valve to uncover any of the ports above the upper face of the piston l? the water will flow from the space above the piston through the recess N holes N, and channel fto the lower or discharge end of the valve-chest. There is another and wider circumferential recess, R so arranged that when its lower edge is carried below the bottom of the piston l. a communi cation will be formed through the nncov ered ports I) and through said recess It with the passage P, which permits the water under pressure from the supply-reservoir to pass from beneath to the top of the piston;

The stem 1)" of the valveis provided with shoulders o 0, between which extends the arm 8 5 X, the shoulders being so far apart as to permit the requisite play ol'the valveindependent of the piston to uncover the ports above or below the latter whatever may be its position in the cylinder 0, but suflicieutly near together to prevent the recess It from being 'raised above or carried below the passage 1?.

The operation of the entire apparatus is as follows: To raise the car thevalve B is moved upward by vibrating a lever, 0, connected to 5 the hand-rope 12, extending through the cage Z. The instant a part of one of the ports above the upper face of the piston Pis uncovered water froxn'the upper end of the cylinder (1 passes through said port and through the K00 follov 1 said valve recess N and holes Ninto the channelfof the auxiliary valve and is carried by ajcounectingpipe, P, from the valve-chest V into the dis charge-pipe. As the area of the piston Pris greater than that of the valve A; there is an excess of pressure upon the under side of the piston, which will cause the latter to rise with the'valv'e B, carrying with it the main valve A, and this upward movement of the piston will continue so long as the valve 18 l S lllOVQd upward or is in. a position to uncover any of the ports above the piston. lfduring. the up ward movement of the piston i? it is desired to arrest the same to hold the valve A in the position which it then occupies, this may he eileeted by carrying the valve i3 downward until all the ports shove the piston are out off from communication with the recess h, *When the piston l is raised so as to lift the lower edge of the valve A ahove the bottom of a porn (13, the. water will ilow into the port as from. below the main piston, which will hegin to descend and raise the cage. if during the upward movement of the cage it is desired to arrest the same hy closing the main valve,this effected by carrying; the lever ti to u l1orieontal nositiorn which will tiring the valve ll u .1 position within its chest, the re 1 he valve l descends uncovering the w is helov: the piston and permit, Miter iloiv under pressure t poi s ii" ti recess lo, and passage to l. to top oi the piston when the latter Will descend in :s' nseqnenee oi the pressure upon the top oithe valve the pressures upon the opposite faces oi" piston l? heing equal the valve B has been brought to a mid-position in the chest the piston I will descend to the position shown in Fig. i and the valve A. ivill he arrested in the 1 tion closing" the dis hhen the cage is to tie-mud the valve ll moved downward and the Water trill flow to "he top ol the 'Jiston and lower the latter 1 ith the valve it, until the "ater in zyliudercan pass shove the valve the u'orhin itthrough the port or: and circulate from the top to the bottom of the Wei-hinge linder as the main piston rises therein hy the Weight of the car as in the Baldwin elevator. The upward movement ol the resin piston is arrested hy hringinn' the valvellto a mid-position, when the escape ol Water from above the piston l vrill permit the latter to ascend under 'essure li'oin helow until it in a central positiou in the. cylinder t) and the valve A. eloses i he seen. that hy the con notion do igght inoveinent oi" the uurviliary either direction will instantly he s correspoudino movement ol the he same direction, which more continued as the inovei'nent oi the itinnoih and vvill he arrested at iullaneousiy uith the stoppage of the no that the attendant manipuuli e i p "ton ii i fieviees connected with tie valve ii has positiveeontrol oi the main vaiv n, and

may lift or lower it to any desired extent and arrest it atany point with certainty,hut Without the labor which is occasioned by having said valve connected directly with the operating mechanism in the cage.

The movement of the piston and main valve Will be almost coincident with that of the auxiliary valve as to time and extent n'oviding the ports I) b and passages are large enough to permit the water to flow with the desired rapidity. it is, however desirahle to limit the speed at which the main valve can be moved, to prevent a too sudden stopping; or starting of the ear. To this end the areaol' the ports is regulated or limited to permit the water to flow at such a speed as will secure the desired rapidity of movement of the main valve. The necessary area of the ports is t'ound by experiment to hear a very small ratio to that of the main val ve, so that the uuiiiliary valve may he of a small size, and will require but a very small effort on the part of the at tendant in the ear to operate it.

the arm 55 not only serves in conjunction with the stops 0 o'to connect the auxiliary piston and main vslve directly to the auxiliary valve and to limit the throw of the auxiliary valve in respect to the piston, so that the two will move together except i'oru slight lost inc-- tion permitted by the stin s, hut it also pre vents the latter from turning to carry the pas save P uu'uy iron: the line of the ports by its hearing against the valv stem 2), which errhis through an opening 11 the arm h.

i Sign S l have shown a tnodilieation in rich the discharge-passage i'roin shove the it on P through the stem of the resin valve ind throu h said valve directly into the disehnrgepipo The port l" (indicated partly hy dotted lines) in this case extends to one side oi'a second passage, 1 F leading from the f e of the piston opposite the row oi ports I)" t through the stern and valve ii, as shown. The valve-chest V in this case is closed atthe lower end and is packed at the upper end around the rod o, and the discharge water iroin shove the piston P passes from the reeoss l t into the port l." instead of being di charged into the channel of the valve lln it channel, if, extends completely through the valve ll, so that the latter is nearly balanced hy nearly equal pressure upon the opposite ends, and a hole if affords a communication between the interior of the casing; it and the hottozn of the valve-chestto allow water to es rape from the valvechest as the valve .l'i' approaches the lower extremity oi its travel.

.iho valves as well as the pistons l shown in the two ooiheations, are represented Without packing-s,

cause should any leakage occur .troni shove thepiston I? t would rise and uncover the ports below i snt'ticiently to permit a supply of water to pass shove and arrest the moveat. l'tany leakage shouldoccur-horn the to the upper side ofthe piston the latter which may he used howeven if desired; hut they are not thought necessary, hei will gradually move downward until the flow of water from above the same through the uncovered ports will cause it to rise. These movements will not open the main valve, in consequence of the extra length or lap of the latter permitting a limited play without opening the discharge pipe or port I have nbt fully shown the elevator-cage and engine, as these parts are too well known to need special illustration or description.

I do not limit myself to the use of an engine the cylinder of which constitutesa part of the casing of the main valve, as the two may be separate, with such changes in the water-ports as this latter arrangement may render necessary.

It will be apparent that various arrangements of the auxiliary cylinder, piston, ports, and passages, in connection with the auxiliary valve at one side of the cylinder, may be employed to effectthe result above set forth. I therefore do not limit myself to the precise arrangementdescribed,nortoanyspecificn iode of operating the auxiliary valve from the cage, nor to the combination of the valve operating appliances with anyspecific form of elevating 'mechanism.

I claim- A 1. The combination,in a hydraulic elevator, of a cylinder having a series of ports, a valve and piston connected thereto, and an auxil iary valve constructed to regulate the flow of the actuating-fluid through said series of ports in respect to the piston, and alever connected to said auxiliary valve and to lever-operating devices between the lever and the cage, substantially as specified.

' 2. The combination, with the main valve of a hydraulic elevator, of an auxiliary engine having its piston connected to said valve and arranged to traverse a series of ports, an aux iliary valve also arranged to traverse said series of ports to direct the flow of the motor-fluid to and from the opposite faces of the auxiliary piston, a passage from the face to the periphery of the piston, and connections for operating said auxiliary valve from the elevatorca e.

The combination, with an engine connected to the main valve of a hydraulic elevator and having a cylinder provided with a series of ports traversed by the piston, of an auxiliary valve connected to be'operatcd fromthe cage of the elevator and also traversing said ports, a passage through the piston, and an exhaust-passage, all arranged substantially as described, to direct the motor-fluid to one side or the other of the piston, according to the direction in which the auxiliary valve is moved through the said ports, and to out 01f the supply or discharge as the piston approaches the position assumed by the auxiliary valve, substantially as specified.

4;. The combinationof the main valve, actuating-piston connected thereto, cylinder having a series of ports traversed by the piston, a'passage leading from one face of the piston to its edge opposite saidports, a dischargepassage, and an auxiliary valve also traversing said ports, with recesses arranged to permit the motor-fluid to be directed from one side to the other of the piston through said ports and auxiliary valve, substantially as specified.

5. The combination, with the main valveol a hydraulic elevator, of an actuating-piston connected thereto, a cylinder having a series of ports along one side communicating with the chest of an auxiliary valve, an auxiliary valve in said chest provided with recesses, a passage from the face to the periphery of the piston, and a discharge-passage for the flow of the water from the space between the piston and cylinder-head to the discharge-port, all arranged tobperate substantially as set forth.

6. The combination of a hydraulic elevator provided with a valve, A, an engine provided with a piston, cylinder, and auxiliary valve connected to be operated from the cage of the elevator, a series of ports between the cylinder and auxiliary-valve chest arranged to be traversed by the piston, a waterpassage through the piston from the face to the periphery, a dischargepassage leading to the dischargepipc, and recesses in the auxiliary valve, all substantially as set forth.

7. The combination of a piston, a cylinder provided with a series of ports extending to opposite sides of thepiston, a main valve conneeted with said piston, an auxiliary valve controlling the flow of fluid through said series of ports to and from opposite sides of the piston at any point of its stroke, and an arm and stops carried by the piston-rod and auxiliary-valve rod to engage at any point of the pistons stroke, according to the adjustment of I the auxiliary valve, substantially as described.

8. The combination, with the main valve of a hydraulic elevator, of an auxiliary engine having its piston connected to said valvea valve connected with the cage for controlling said auxiliary piston, a series of ports between the valve-easing and engine-cylinder, the auxiliary valve, auxiliary piston, and main valve being connected substantially as described, whereby the main valve is under the direct and positive control of the operator in the cage. In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

NORMAN O. BASSE'LT. Witnesses:

Amman E. BARR, I W. ANAnLn. 

